/**
 * The MIT License (MIT)
 * 
 * Copyright (c) 2016 mo_yq5 (mo_yq5@163.com)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 */
/**
 * 统一收单交易撤销接口<br>
 * 支付交易返回失败或支付系统超时，调用该接口撤销交易。<br>
 * 如果此订单用户支付失败，支付宝系统会将此订单关闭；<br>
 * 如果用户支付成功，支付宝系统会将此订单资金退还给用户。 <br>
 * 注意：只有发生支付系统超时或者支付结果未知时可调用撤销，其他正常支付的单如需实现相同功能请调用申请退款API。<br>
 * 提交支付交易后调用【查询订单API】，没有明确的支付结果再调用【撤销订单API】。
 * @author Moyq5
 * @since 2016年8月7日
 */
package com.openapi.alipay.trade.cancel;